State police urge the public not contact Martinson, who should be considered armed and dangerous. If you see him, call 911.

Martinson was spotted several times Tuesday night and Wednesday morning and has eluded officers on a motorcycle on several remote paved and dirt roads, state police said.

The motorcycle is described as black with a red tank.

Martinson was last seen Wednesday morning wearing full camouflage clothing. He has shaved his head, police said.

OSP troopers from several Department divisions (Patrol, Criminal, Fish & Wildlife) are involved in the search with support from other agencies on the ground and in the air including California Highway Patrol, Del Norte County, California Sheriff's Office and the US Marshals Service.